IFRAME driving me crazy!

Alright, I just had WP installed in my subdomain by my host and getting it configured has been…well…less than pleasant to say the least. I’ve finally got all the content looking the way I like, but I CANNOT get the iframe setup correct. No matter what I’ve tried to do, the main.php which shows up within the main iframe on my site always has a little extra space on the right…I cannot figure out how to get rid of this. I’ve resized all the divs so that the actual content fits inside the iframe perfectly, but something continues to add extra space on the right so that I can’t get rid of that cursed bottom sideways scrollbar.

My site: http://frisky.cuddle-bug.net
The page alone: http://frisky.cuddle-bug.net/WP/main.php
Alternate index (I didn’t want to mess around with the page everyone was seeing so I just put up a copy with the main.php instead of main.html as in link above): http://frisky.cuddle-bug.net/index2.html
And the wp-layout.css: http://frisky.cuddle-bug.net/WP/wp-layout.css